diff options
Diffstat (limited to '')
| -rw-r--r-- | man3/mallopt.3 | 28 |
1 files changed, 14 insertions, 14 deletions
diff --git a/man3/mallopt.3 b/man3/mallopt.3 index 5fdda5c..6922b0f 100644 --- a/man3/mallopt.3 +++ b/man3/mallopt.3 @@ -2,7 +2,7 @@ .\" .\" SPDX-License-Identifier: Linux-man-pages-copyleft .\" -.TH mallopt 3 2023-05-03 "Linux man-pages 6.05.01" +.TH mallopt 3 2024-02-26 "Linux man-pages 6.7" .SH NAME mallopt \- set memory allocation parameters .SH LIBRARY @@ -11,7 +11,7 @@ Standard C library .SH SYNOPSIS .nf .B #include <malloc.h> -.PP +.P .BI "int mallopt(int " param ", int " value ); .fi .SH DESCRIPTION @@ -25,7 +25,7 @@ The argument specifies the parameter to be modified, and .I value specifies the new value for that parameter. -.PP +.P The following values can be specified for .IR param : .TP @@ -355,7 +355,7 @@ then the settings take precedence.) For security reasons, these variables are ignored in set-user-ID and set-group-ID programs. -.PP +.P The environment variables are as follows (note the trailing underscore at the end of the name of some variables): .TP @@ -455,7 +455,7 @@ glibc 2.0. Specifying an invalid value for .I param does not generate an error. -.PP +.P A calculation error within the glibc implementation means that a call of the form: .\" FIXME . This looks buggy: @@ -463,13 +463,13 @@ a call of the form: .\" malloc requests are rounded up: .\" (req) + SIZE_SZ + MALLOC_ALIGN_MASK) & ~MALLOC_ALIGN_MASK .\" https://www.sourceware.org/bugzilla/show_bug.cgi?id=12129 -.PP +.P .in +4n .EX mallopt(M_MXFAST, n) .EE .in -.PP +.P does not result in fastbins being employed for all allocations of size up to .IR n . To ensure desired results, @@ -480,7 +480,7 @@ where .I k is an integer. .\" Bins are multiples of 2 * sizeof(size_t) + sizeof(size_t) -.PP +.P If .BR mallopt () is used to set @@ -510,11 +510,11 @@ then that argument is used to set the parameter. The program then allocates a block of memory, and frees it twice (an error). -.PP +.P The following shell session shows what happens when we run this program under glibc, with the default value for .BR M_CHECK_ACTION : -.PP +.P .in +4n .EX $ \fB./a.out\fP @@ -536,10 +536,10 @@ bff53000\-bff74000 rw\-p 00000000 00:00 0 [stack] Aborted (core dumped) .EE .in -.PP +.P The following runs show the results when employing other values for .BR M_CHECK_ACTION : -.PP +.P .in +4n .EX $ \fB./a.out 1\fP # Diagnose error and continue @@ -554,11 +554,11 @@ main(): returned from first free() call main(): returned from second free() call .EE .in -.PP +.P The next run shows how to set the same parameter using the .B MALLOC_CHECK_ environment variable: -.PP +.P .in +4n .EX $ \fBMALLOC_CHECK_=1 ./a.out\fP |